Nick Diaz took the fight on short notice. He was replacing Thiago Alves who had to pull out of the fight due to injury. I don't really think Diaz is a loser. Yes, he lost 3 fights in a row, but they were all to solid fighters and were close fights. He's a young guy, and has alot of potential.
I don't agree with you calling Josh Neer a loser either, he's 17-5 and trains with some of the best fighters in the world(MFS). He's also young, and still has alot of fights left in him.